EMX D-TEK Loop Detectors Manuals & Support

The EMX D-TEK is an 11-pin plug-in vehicle loop detector in an aluminum housing. Versions run on 115 VAC, 12 VDC or 24 VAC.

It has 10 sensitivity settings, delay and extend, fail-safe or fail-secure, automatic sensitivity boost, loop diagnostics with a frequency counter and pulse or two presence relay operation.

Buy the D-TEK (4 options)

Identify your model

Basic controls are on the front and advanced settings are on the back. The power version is printed on the label. For the multi-voltage model, see the MVP D-TEK. LP-D-TEK: low power version for solar and battery gates.

Key specs

Power	115 VAC, 12 VDC or 24 VAC by model
Connector	11-pin
Sensitivity	10 settings, automatic boost
Relays	Presence relay plus second relay (pulse or presence)
Modes	Fail-safe or fail-secure, delay and extend
Diagnostics	Loop fault LEDs and frequency counter
Housing	Anodized aluminum

Manuals and documents

Installation Manual

D-TEK Operating Instructions (115 VAC and 12 VDC)
15 pages View PDF: D-TEK Operating Instructions (115 VAC and 12 VDC) (opens in a new tab)
D-TEK Operating Instructions (24 VAC)
5 pages View PDF: D-TEK Operating Instructions (24 VAC) (opens in a new tab)
LP-D-TEK Instruction Manual
8 pages View PDF: LP-D-TEK Instruction Manual (opens in a new tab)

Spec Sheet

LP-D-TEK Spec Sheet
2 pages View PDF: LP-D-TEK Spec Sheet (opens in a new tab)

Troubleshooting

LEDs

Green on: powered. Red on: vehicle detected.
Green blinking: the loop is shorted or open now.
Green with two fast blinks: a past loop fault that cleared.
Red blinking at start of detect: filter on. At end: extend on. During detect: 4 minute limited presence.

Green LED off

Check voltage on pins 1 and 2, the internal fuse and the wiring.

Loop faults or stuck in detect

Loop resistance on pins 7 and 8 should be 0.5 to 5 ohms and steady while driving over the loop.
Megger the loop to ground. It should read over 100 megaohms.
Check splices are soldered and sealed and terminals are tight.

Intermittent calls

Check for crosstalk with nearby detectors and change the frequency on one of them.

Common questions

Match the operator accessory power: 115 VAC, 12 VDC or 24 VAC. For one detector that runs on several voltages, use the MVP D-TEK.

Use direct-burial loop wire such as 16 AWG XLPE, not THHN. Twist the lead-in about 6 turns per foot from the loop to the detector, and seal saw cuts with loop sealant.

Between 0.5 and 5 ohms, and over 100 megaohms to ground.